13F-HR 1 jdn13f-q408.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: December 31, 2008 ----------------- Check here if Amendment [ ]; Amendment Number: -------- This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: JDN Capital Management, LP -------------------------- Address: 2420 Camino Ramon Suite 222 -------------------------- San Ramon, CA 94583 -------------------------- -------------------------- Form 13F File Number: 28- 11131 --------------------- The institutional investment manager filing this report and the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: John Nguyen ---------------------------- Title: General Partner ---------------------------- Phone: 925-244-5990 ---------------------------- Signature, Place, and Date of Signing /s/ John Nguyen San Ramon, CA January 26, 2009 --------------------- ------------------------- ----------------- [Signature] [City, State] [Date] Report Type (Check only one.): [x] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE (Check here if no holdings are in this report, and all holdings are reported by other reporting manager(s).) [ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting managers (s).) FORM13F SUMMARY Report Summary: Number of Other Included Managers: 0 ----------------- Form 13F Information Table Entry Total: 129 ----------------- Form 13F Information Table Value Total: 52,894 ----------------- (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. [If there are no entries in this list, state "NONE" and omit the column headings and list entries.] NONE

column 1 column 2 column 3 column 4 column 5 column 6 column 7 column 8 -------- -------- -------- -------- -------- ---------- -------- -------- ------------------------------------------------------------------------------------------------------------------------------------ Investment Other Voting Authority Name of Issuer Title of Cusip Value Shrs or sh/ put/ Discretion Managers Sole Shared None Class (x$1000) prn amt prn call ------------------ ------- ------- -------- ------- --- ---- ---------- -------- ---- ---- ---- ACI Worldwide Inc com 004498101 ~~1211~~333 ~~68837~~20926 SH SOLE ~~68837~~20926 0 0 Adaptec Inc com ~~00651F108~~00651F10 ~~424~~286 ~~132362~~86662 SH SOLE ~~132362~~86662 0 0 ~~Advanced~~Amicas ~~Micro Devices~~ Inc com ~~007903107~~001712108 ~~352~~519 ~~60300~~310939 SH SOLE ~~60300~~310939 0 0 ~~Amicas~~Anadigics ~~Inc~~ com ~~001712108~~032515108 ~~943~~309 ~~332107~~208600 SH SOLE ~~332107~~208600 0 0 ~~Aspen~~Apple ~~Insurance~~Computer ~~Holdings~~Inc ~~Ltd~~ com ~~G05384105~~037833100 ~~438~~283 ~~18500~~3320 SH SOLE ~~18500~~3320 0 0 ~~Avid~~Applied ~~Technolgy~~Matls Inc com ~~05367P100~~038222105 ~~150~~425 ~~8803~~42000 SH SOLE ~~8803~~42000 0 0 ~~Avnet~~Aspen ~~Inc~~Insurance Holdings Ltd com ~~053807103~~G05384105 ~~1266~~468 ~~46400~~19300 SH SOLE ~~46400~~19300 0 0 ~~Axcelis~~Avnet ~~Technologies~~ Inc com ~~054540109~~053807103 ~~849~~1160 ~~173929~~63700 SH SOLE ~~173929~~63700 0 0 ~~Bed~~Bank ~~Bath~~of &America ~~Beyond~~Corp ~~Inc~~ com ~~075896100~~060505104 ~~281~~774 ~~10000~~55000 SH SOLE ~~10000~~55000 0 0 Bell Microproducts Inc com 078137106 ~~657~~133 ~~271694~~221694 SH SOLE ~~271694~~221694 0 0 ~~Borland~~Best ~~Software~~Buy ~~Corp~~Inc com ~~099849101~~086516101 ~~259~~323 ~~190546~~11500 SH SOLE ~~190546~~11500 0 0 ~~CBRE~~Borland ~~Realty~~Software ~~Finance~~Corp ~~Inc~~ com ~~12498B307~~099849101 ~~123~~162 ~~35675~~154646 SH SOLE ~~35675~~154646 0 0 CRM Holdings Ltd com G2554P103 ~~451~~182 ~~133733~~107333 SH SOLE ~~133733~~107333 0 0 Cadence Design Systems Inc com 127387108 ~~1287~~430 ~~127393~~117393 SH SOLE ~~127393~~117393 0 0 CalAmp Corp com 128126109 ~~448~~80 ~~220716~~177494 SH SOLE ~~220716~~177494 0 0 ~~Carrington~~Cerion ~~Labs~~Tech ~~Inc~~ com ~~144525102~~156916108 3 ~~10300~~10100 SH SOLE ~~10300~~10100 0 0 ~~Cerion~~Cerner ~~Tech~~Corp com ~~156916108~~156782104 4155 ~~10100~~4028 SH SOLE ~~10100~~4028 0 0 Chemtura Corp com 163893100 ~~888~~174 ~~152100~~124059 SH SOLE ~~152100~~124059 0 0 Chevron Corporation com 166764100 ~~2766~~1672 ~~27900~~22600 SH SOLE ~~27900~~22600 0 0 Cisco Sys Inc com 17275R102 ~~226~~130 ~~9700~~8000 SH SOLE ~~9700~~8000 0 0 ~~Clear~~Citigroup ~~Channel~~Inc ~~Communications~~ com ~~184502102~~172967101 ~~528~~254 ~~15000~~37800 SH SOLE ~~15000~~37800 0 0 Cognex Corp com 192422103 ~~1476~~773 ~~64017~~52217 SH SOLE ~~64017~~52217 0 0 Comcast Corp com 20030N101 ~~474~~771 ~~25000~~45700 SH SOLE ~~25000~~45700 0 0 Commscope Inc com 203372107 ~~1358~~276 ~~25726~~17736 SH SOLE ~~25726~~17736 0 0 ~~Cost~~Community ~~Plus~~Health Sys Inc com ~~221485105~~203668108 ~~227~~435 ~~90600~~29860 SH SOLE ~~90600~~29860 0 0 ~~Countrywide~~Conagra ~~Financial~~Foods ~~Corp~~Inc com ~~222372104~~205887102 ~~467~~165 ~~109775~~10000 SH SOLE ~~109775~~10000 0 0 Cost Plus Inc com 221485105 69 73383 SH SOLE 73383 0 0 Cypress Semiconductor Corp com 232806109 ~~955~~173 38600 SH SOLE 38600 0 0 DSP Group Inc com 23332B106 ~~964~~848 ~~137726~~105770 SH SOLE ~~137726~~105770 0 0 Dean Foods Co com 242370104 ~~1330~~987 ~~67800~~54905 SH SOLE ~~67800~~54905 0 0 Delia's Inc com 246911101 ~~238~~226 ~~118430~~102792 SH SOLE ~~118430~~102792 0 0 Dell Inc com 247025109 ~~821~~323 ~~37500~~31500 SH SOLE ~~37500~~31500 0 0 Delsite Inc com 24734R103 1 10300 SH SOLE 10300 0 0 Diamond Offshore Drilling Inc com 25271C102 ~~696~~253 ~~5000~~4300 SH SOLE ~~5000~~4300 0 0 E M C Corp Mass com 268648102 ~~604~~360 ~~41100~~34400 SH SOLE ~~41100~~34400 0 0 EBay Inc com 278642103 236 16900 SH SOLE 16900 0 0 Electro Scientific Inds com 285229100 ~~677~~312 ~~47779~~45950 SH SOLE ~~47779~~45950 0 0 Emrise Corp com 29246J101 8928 ~~136479~~18188 SH SOLE ~~136479~~18188 0 0 Exar Corp com 300645108 ~~1173~~844 ~~155524~~126524 SH SOLE ~~155524~~126524 0 0 ~~Family~~Federal ~~Dlr~~Mogul ~~Stores~~Corp ~~Inc~~ com ~~307000109~~313549404 ~~1218~~280 ~~61100~~66291 SH SOLE ~~61100~~66291 0 0 Flextronics Intl Ltd com Y2573F102 ~~1059~~429 ~~112701~~167701 SH SOLE ~~112701~~167701 0 0 FormFactor Inc com 346375108 ~~184~~477 ~~10000~~32700 SH SOLE ~~10000~~32700 0 0 ~~Gevity~~Freeport-McMoran HRCopper ~~Inc~~& Go com ~~374393106~~35671D857 ~~292~~330 ~~54367~~13500 SH SOLE ~~54367~~13500 0 0 ~~Greenfield~~Future ~~Online~~Healthcare com 360911101 0 14600 SH SOLE 14600 0 0 General Electric Co com 369604103 465 28700 SH SOLE 28700 0 0 Gevity HR Inc com ~~395150105~~374393106 ~~574~~59 ~~38479~~39368 SH SOLE ~~38479~~39368 0 0 Grubb & Ellis Co com 400095204 ~~678~~177 ~~176000~~142780 SH SOLE ~~176000~~142780 0 0 HMS Hldgs Corp com 40425J101 ~~268~~394 12500 SH SOLE 12500 0 0 ~~Hot~~Hertz ~~Topic~~Global Holdings Inc com ~~441339108~~42805T105 ~~817~~157 ~~151087~~31000 SH SOLE ~~151087~~31000 0 0 ~~Hutchinson~~Hot ~~Technology~~Topic Inc com ~~448407106~~441339108 ~~134~~999 ~~10000~~107787 SH SOLE ~~10000~~107787 0 0 ~~Imation~~ICT ~~Corp~~Group Inc com ~~45245A107~~44929Y101 ~~1336~~241 ~~58306~~52691 SH SOLE ~~58306~~52691 0 0 Ingram Micro com 457153104 ~~1861~~922 ~~104855~~68855 SH SOLE ~~104855~~68855 0 0 Intel Corp com 458140100 ~~2252~~1376 ~~104850~~93850 SH SOLE ~~104850~~93850 0 0 ~~Intervoice~~Intersil ~~Inc~~Corp com ~~461142101~~46069S109 ~~1456~~320 ~~255445~~34800 SH SOLE ~~255445~~34800 0 0 Itron Inc com 465741106 ~~334~~217 3400 SH SOLE 3400 0 0 JDS Uniphase Corp com ~~46612J507~~466121J507 ~~1411~~420 ~~124250~~115082 SH SOLE ~~124250~~115082 0 0 JP Morgan Chase & Co com 46625H100 936 29700 SH SOLE 29700 0 0 Jabil Circuit Inc com 466313103 ~~1029~~592 ~~62700~~87700 SH SOLE ~~62700~~87700 0 0 ~~Jamba~~Jumbo ~~Inc~~Sports com ~~47023A101~~481386100 370 20000 SH SOLE 20000 0 0 KBR Inc com 48242W106 1377 90600 SH SOLE 90600 0 0 Kforce Inc com 493732101 ~~195~~142 ~~22994~~18486 SH SOLE ~~22994~~18486 0 0 ~~LeCroy~~LECG Corp com ~~52324W109~~523234102 ~~305~~181 ~~34166~~26908 SH SOLE ~~34166~~26908 0 0 ~~Legg~~LeCroy ~~Mason~~Corp ~~Inc~~ com ~~524901105~~52324W109 ~~654~~89 ~~15000~~29166 SH SOLE ~~15000~~29166 0 0 LifePoint Hospitals Inc com 53219L109 ~~1500~~898 ~~53000~~39300 SH SOLE ~~53000~~39300 0 0 ~~Liz~~Livewire ~~Claiborne~~Mobile Inc com ~~539320101~~53837P102 ~~304~~51 ~~21500~~530450 SH SOLE ~~21500~~530450 0 0 Mc Donalds com 580135101 ~~747~~826 13284 SH SOLE 13284 0 0 McCormick & Schmicks Seafd R com 579793100 ~~657~~255 ~~68204~~63339 SH SOLE ~~68204~~63339 0 0 Mediware Information Sys Inc com 584946107 ~~246~~156 ~~42011~~32411 SH SOLE ~~42011~~32411 0 0 Mentor Graphics Corp com 587200106 ~~2132~~645 ~~134960~~124760 SH SOLE ~~134960~~124760 0 0 Mercer Ins Group Inc com 587902107 ~~500~~302 ~~28865~~23865 SH SOLE ~~28865~~23865 0 0 Mercury Computer Sys com 589378108 ~~123~~85 ~~16400~~13400 SH SOLE ~~16400~~13400 0 0 ~~Merix~~Microsoft Corp com ~~590049102~~594918104 ~~322~~397 ~~140000~~20400 SH SOLE ~~140000~~20400 0 0 ~~Meruelo Maddux Properties Inc com 590473104 31 14214 SH SOLE 14214 0 0~~ Montpelier Re Holdings Ltd com G62185106 ~~648~~591 ~~43900~~35200 SH SOLE ~~43900~~35200 0 0 Motorola Inc com 620076109 ~~642~~343 ~~87400~~77400 SH SOLE ~~87400~~77400 0 0 Myers Inds Inc com 628464109 ~~564~~453 ~~69250~~56650 SH SOLE ~~69250~~56650 0 0 Mylan Inc com 628530107 ~~1322~~885 ~~109500~~89500 SH SOLE ~~109500~~89500 0 0 ~~NMS Communications Corp com 629248105 650 585450 SH SOLE 585450 0 0~~ Nautilus Inc com 63910B102 ~~515~~79 ~~101383~~35807 SH SOLE ~~101383~~35807 0 0 Newport Corp com 651824104 ~~671~~332 ~~58923~~48923 SH SOLE ~~58923~~48923 0 0 Nokia Corp com 654902204 ~~1078~~577 ~~44000~~37000 SH SOLE ~~44000~~37000 0 0 ~~Nortel~~Novatel ~~Networks~~Wireless ~~Corp~~Inc com ~~656568102~~66987M604 ~~108~~361 ~~13130~~77891 SH SOLE ~~13130~~77891 0 0 ~~Novatel~~Novell ~~Wireless~~ Inc com ~~66987M604~~670006105 ~~111~~427 ~~10000~~109702 SH SOLE ~~10000~~109702 0 0 ~~Novell~~Novellus Sys Inc com ~~670006105~~670008101 ~~793~~202 ~~134702~~16400 SH SOLE ~~134702~~16400 0 0 ~~Novellus~~OM ~~Sys~~Group Inc com ~~670008101~~670872100 ~~390~~733 ~~18400~~34700 SH SOLE ~~18400~~34700 0 0 Office Depot Inc com 676220106 ~~1203~~283 ~~110000~~95000 SH SOLE ~~110000~~95000 0 0 On-Assignment Inc com 682159108 ~~2023~~941 ~~252197~~165997 SH SOLE ~~252197~~165997 0 0 ~~PSS~~Owens ~~World~~Ill ~~Medical~~ Inc com ~~69366A100~~690768403 ~~1045~~607 ~~64121~~22200 SH SOLE ~~64121~~22200 0 0 Pacific Sunwear Calif Inc com 694873100 ~~1037~~129 ~~121586~~81131 SH SOLE ~~121586~~81131 0 0 Pantry Inc com 698657103 ~~371~~612 ~~34800~~28509 SH SOLE ~~34800~~28509 0 0 ~~PeopleSupport Inc com 712714302 722 84904 SH SOLE 84904 0 0~~ Pfizer Inc com 717081103 ~~344~~289 ~~19700~~16300 SH SOLE ~~19700~~16300 0 0 ~~PharmaNet Development Group Inc com 717148100 312 19799 SH SOLE 19799 0 0~~ Photronics Inc com 719405102 ~~1063~~288 ~~151036~~147783 SH SOLE ~~151036~~147783 0 0 ~~Pilgrims Pride Corp com 721467108 831 64000 SH SOLE 64000 0 0~~ Plantronics Inc com 727493108 ~~670~~317 ~~30000~~24000 SH SOLE ~~30000~~24000 0 0 Powerwave Technologies Inc com 739363109 ~~1555~~150 ~~365800~~300800 SH SOLE ~~365800~~300800 0 0 Presstek Inc com 741113104 ~~133~~86 26776 SH SOLE 26776 0 0 Pride Intl Inc Del com 74153Q102 ~~525~~177 11100 SH SOLE 11100 0 0 ~~Quiksilver Inc com 74838C106 1421 144700 SH SOLE 144700 0 0~~ RF MicroDevices Inc com 749941100 ~~416~~91 ~~143281~~117081 SH SOLE ~~143281~~117081 0 0 RTI Biologics Inc com 74975N105 ~~243~~169 ~~27800~~61216 SH SOLE ~~27800~~61216 0 0 Rackable Systems Inc com 750077109 ~~290~~191 ~~21635~~48572 SH SOLE ~~21635~~48572 0 0 Radisys Corp com 750459109 ~~703~~349 ~~77584~~63032 SH SOLE ~~77584~~63032 0 0 Ruby Tuesday Inc com 781182100 ~~443~~130 ~~82100~~83500 SH SOLE ~~82100~~83500 0 0 SAIA Inc com 81111T102 ~~356~~283 ~~32600~~26100 SH SOLE ~~32600~~26100 0 0 SLM Corp com 78442P106 ~~968~~282 ~~50000~~31700 SH SOLE ~~50000~~31700 0 0 Safeway Inc com 786514208 1300 54700 SH SOLE 54700 0 0 Sara Lee Corp com 803111103 ~~1443~~1021 ~~117783~~104283 SH SOLE ~~117783~~104283 0 0 Sentry Technology com 81731K101 31 45100 SH SOLE 45100 0 0 ~~Smurfit-Stone~~Service ~~Container~~ Corp Intl com ~~832727101~~817565104 ~~542~~124 ~~133114~~25000 SH SOLE ~~133114~~25000 0 0 Skyworks Solutions Inc com 83088M102 69 12494 SH SOLE 12494 0 0 Sonic Innovations Inc com 83545M109 88 88414 SH SOLE 88414 0 0 Southwest Airls Co com 844741108 ~~2060~~931 ~~158000~~108000 SH SOLE ~~158000~~108000 0 0 StarTek Inc com 85569C107 ~~366~~154 ~~38958~~34542 SH SOLE ~~38958~~34542 0 0 Starbucks Corp com 855244109 ~~944~~468 ~~60000~~49500 SH SOLE ~~60000~~49500 0 0 Sun Microsystems Inc com 866810104 ~~611~~493 ~~56150~~129150 SH SOLE ~~56150~~129150 0 0 Sunpower Corp Cl B com 867652307 270 8886 SH SOLE 8886 0 0 Symmetricom Inc com 871543104 ~~478~~451 ~~124394~~114194 SH SOLE ~~124394~~114194 0 0 Synopsys Inc com 871607107 ~~1109~~970 ~~46392~~52392 SH SOLE ~~46392~~52392 0 0 TII Network Technologies Inc com 872479209 249 15000 SH SOLE 15000 0 0 Theragenics Corp com 883375107 ~~1220~~398 ~~336200~~340330 SH SOLE ~~336200~~340330 0 0 Thomas Weisel Partners Group ~~Inccom~~com 884481102 ~~634~~449 ~~115845~~95045 SH SOLE ~~115845~~95045 0 0 Time Warner Inc com 887317105 ~~1089~~593 ~~73600~~58900 SH SOLE ~~73600~~58900 0 0 Transocean ~~Inc~~Ltd com G90073100 ~~533~~142 ~~3497~~2997 SH SOLE ~~3497~~2997 0 0 ~~Tuesday Morning Corp com 899035505 48 11671 SH SOLE 11671 0 0~~ UCBH Holdings Inc com 90262T308 ~~281~~374 ~~124919~~54419 SH SOLE ~~124919~~54419 0 0 United Parcel Service Inc com 911312106 ~~676~~519 ~~11000~~9400 SH SOLE ~~11000~~9400 0 0 Urologix Inc com 917273104 ~~221~~59 ~~124928~~107928 SH SOLE ~~124928~~107928 0 0 Vignette Corp com 926734104 ~~1370~~806 ~~114154~~85650 SH SOLE ~~114154~~85650 0 0 Vishay Intertechnology Inc com 928298108 ~~1192~~545 ~~134400~~159400 SH SOLE ~~134400~~159400 0 0 Wabash National Corp com 929566107 ~~423~~213 ~~56000~~47300 SH SOLE ~~56000~~47300 0 0 Waste Mgmt Inc com 94106L109 ~~1335~~1329 ~~35400~~40100 SH SOLE ~~35400~~40100 0 0 ~~X-Rite~~Western ~~Inc~~Digital Corp com ~~983857103~~958102105 51630 ~~19808~~55000 SH SOLE ~~19808~~55000 0 0 YRC Worldwide Inc com 984249102 ~~825~~35 ~~55500~~12100 SH SOLE ~~55500~~12100 0 0 Zoran Cop com 98975F101 ~~256~~566 ~~21865~~82907 SH SOLE ~~21865~~82907 0 0

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